src/vendor/pest/benches/json.rs

   1 // pest. Elegant, efficient grammars
   2 // Copyright (C) 2016  Dragoș Tiselice
   3 //
   4 // This Source Code Form is subject to the terms of the Mozilla Public
   5 // License, v. 2.0. If a copy of the MPL was not distributed with this
   6 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
   7
   8 #![recursion_limit = "80"]
   9 #![feature(test)]
  10
  11 extern crate test;
  12
  13 #[macro_use]
  14 extern crate pest;
  15
  16 use std::fs::File;
  17 use std::io::Read;
  18
  19 use test::Bencher;
  20
  21 use pest::prelude::*;
  22
  23 impl_rdp! {
  24     grammar! {
  25         json = { value ~ eoi }
  26
  27         object = { ["{"] ~ pair ~ ([","] ~ pair)* ~ ["}"] | ["{"] ~ ["}"] }
  28         pair   = { string ~ [":"] ~ value }
  29
  30         array = { ["["] ~ value ~ ([","] ~ value)* ~ ["]"] | ["["] ~ ["]"] }
  31
  32         value = { string | number | object | array | ["true"] | ["false"] | ["null"] }
  33
  34         string  = @{ ["\""] ~ (escape | !(["\""] | ["\\"]) ~ any)* ~ ["\""] }
  35         escape  =  { ["\\"] ~ (["\""] | ["\\"] | ["/"] | ["b"] | ["f"] | ["n"] | ["r"] | ["t"] | unicode) }
  36         unicode =  { ["u"] ~ hex ~ hex ~ hex ~ hex }
  37         hex     =  { ['0'..'9'] | ['a'..'f'] | ['A'..'F'] }
  38
  39         number = @{ ["-"]? ~ int ~ (["."] ~ ['0'..'9']+ ~ exp? | exp)? }
  40         int    =  { ["0"] | ['1'..'9'] ~ ['0'..'9']* }
  41         exp    =  { (["E"] | ["e"]) ~ (["+"] | ["-"])? ~ int }
  42
  43         whitespace = _{ [" "] | ["\t"] | ["\r"] | ["\n"] }
  44     }
  45 }
  46
  47 #[bench]
  48 fn data(b: &mut Bencher) {
  49     let mut file = File::open("benches/data.json").unwrap();
  50     let mut data = String::new();
  51
  52     file.read_to_string(&mut data).unwrap();
  53
  54     let mut parser = Rdp::new(StringInput::new(&data));
  55
  56     b.iter(|| {
  57         parser.json();
  58
  59         parser.reset();
  60     });
  61 }